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    BIODEGRADABLE AND POLYMERIZABLE POLYESTER COMPOSITION, BIODEGRADABLE POLYESTER RESIN OBTAINED THEREFROM, AND PREPARATION METHOD THEREOF
    1.
    发明公开
    BIODEGRADABLE AND POLYMERIZABLE POLYESTER COMPOSITION, BIODEGRADABLE POLYESTER RESIN OBTAINED THEREFROM, AND PREPARATION METHOD THEREOF 审中-公开

    公开(公告)号：US20240084128A1

    公开(公告)日：2024-03-14

    申请号：US18307802

    申请日：2023-04-27

    申请人： Ecovance Co. Ltd.

    发明人： Kyung Youn KIM ,  Seong Dong KIM ,  Hoon KIM ,  Hyung Mo KIM

    IPC分类号： C08L67/02 ,  C08L67/04

    CPC分类号： C08L67/02 ,  C08L67/04 ,  C08L2201/06

    摘要： Embodiments relate to a biodegradable and polymerizable polyester composition, to a biodegradable polyester resin prepared therefrom, and to a process for preparing the same. As the biodegradable and polymerizable polyester composition comprises an inorganic filler in a certain content and satisfies a certain range of viscosity, it has excellent dispersibility during polycondensation; thus, it is possible to control the content of metals in a biodegradable polyester resin prepared from the biodegradable polyester polymerization composition and the dispersion index within optimal ranges. In addition, as the biodegradable and polymerizable polyester composition comprising an inorganic filler is subjected to a polycondensation reaction, the dispersibility during the polycondensation reaction is very excellent, which can suppress the aggregation of inorganic filler particles and prevent filter clogging, resulting in a decrease in defects such as voids in the processing process. Thus, it is possible to provide a biodegradable film and molded article of excellent quality.

    BIODEGRADABLE MOLDED ARTICLE AND BIODEGRADABLE POLYESTER RESIN COMPOSITION
    2.
    发明公开
    BIODEGRADABLE MOLDED ARTICLE AND BIODEGRADABLE POLYESTER RESIN COMPOSITION 审中-公开

    公开(公告)号：US20230374204A1

    公开(公告)日：2023-11-23

    申请号：US18320843

    申请日：2023-05-19

    申请人： Ecovance Co. Ltd.

    发明人： Kyung Youn KIM ,  Seong Dong KIM ,  Hoon KIM ,  Jun Su BYEON

    IPC分类号： C08G63/183

    CPC分类号： C08G63/183

    摘要： An eco-friendly biodegradable molded article, which includes a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein a biodegradability per hydrolysis degree of the biodegradable molded article is 1.35 or more, wherein the biodegradability per hydrolysis degree is obtained by dividing a biodegradability after nine weeks by a hydrolysis degree after one week, wherein the biodegradability after nine weeks and the hydrolysis degree after one week are measured by a measurement method below.

    BIODEGRADABLE POLYESTER RESIN, PREPERATION METHOD THEREOF, AND BIODEGRADABLE POLYESTER MOLDED ARTICLE COMPRISING THE SAME
    7.
    发明申请
    BIODEGRADABLE POLYESTER RESIN, PREPERATION METHOD THEREOF, AND BIODEGRADABLE POLYESTER MOLDED ARTICLE COMPRISING THE SAME 有权

    公开(公告)号：US20220389215A1

    公开(公告)日：2022-12-08

    申请号：US17824033

    申请日：2022-05-25

    申请人： Ecovance Co. Ltd.

    发明人： Kyung Youn KIM ,  Hoon KIM ,  Seong Dong KIM ,  Hyung Mo KIM

    IPC分类号： C08L67/02

    摘要： The present invention relates to biodegradable polyester resin, wherein the ratio (X/Y) of the number (X) of the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue to the number (Y) of the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue is 0.8 to 3.0, and the impact strength index is 2.2 or more, and to a process for preparing the same. The biodegradable polyester resin can further enhance the impact absorption energy and hardness as compared with conventional biodegradable resins. Further, it can provide a biodegradable polyester film or molded article that is excellent in impact resistance, durability, and formability, along with biodegradability. Thus, it can be utilized in more diverse fields.

    BIODEGRADABLE POLYESTER RESIN, PREPERATION METHOD THEREOF, AND BIODEGRADABLE POLYESTER FILM COMPRISING SAME
    8.
    发明公开
    BIODEGRADABLE POLYESTER RESIN, PREPERATION METHOD THEREOF, AND BIODEGRADABLE POLYESTER FILM COMPRISING SAME 审中-公开

    公开(公告)号：US20230383116A1

    公开(公告)日：2023-11-30

    申请号：US18307018

    申请日：2023-04-26

    申请人： Ecovance Co. Ltd.

    发明人： Kyung Youn KIM ,  Seong Dong KIM ,  Hoon KIM

    IPC分类号： C08L67/02

    CPC分类号： C08L67/02

    摘要： The embodiments relate to a biodegradable polyester resin, to a process for preparing the same, and to a biodegradable polyester film comprising the same. As the biodegradable polyester resin has a polydispersity index (PDI) and a weight reduction rate satisfying specific ranges, all of the biodegradability, mechanical properties such as tensile strength and impact strength, and thermal resistance can be enhanced. In addition, when the biodegradable polyester resin is used to prepare a film, it is possible to prevent the incident of defects such as fumes, bubbles, and fisheyes, thereby enhancing processability and productivity. Accordingly, the biodegradable polyester resin according to the embodiment can be applied to various fields that require thermal resistance and moldability, such as medical devices or containers, disposable food containers, and the like, so that they would exhibit excellent characteristics.

    BIODEGRADABLE POLYESTER RESIN, PREPERATION METHOD THEREOF, AND BIODEGRADABLE POLYESTER FILM COMPRISING SAME
    10.
    发明公开
    BIODEGRADABLE POLYESTER RESIN, PREPERATION METHOD THEREOF, AND BIODEGRADABLE POLYESTER FILM COMPRISING SAME 审中-公开

    公开(公告)号：US20230374293A1

    公开(公告)日：2023-11-23

    申请号：US18307019

    申请日：2023-04-26

    申请人： Ecovance Co. Ltd.

    发明人： Kyung Youn KIM ,  Ji Yeon RYU ,  Seong Dong KIM ,  Hoon KIM

    IPC分类号： C08L67/02

    CPC分类号： C08L67/02

    摘要： Embodiments relate to a biodegradable polyester resin, to a process for preparing the same, and to a biodegradable polyester film comprising the same. The biodegradable polyester resin has peaks at a certain diffraction angle (2θ) in an X-ray diffraction spectrum (XRD), while it satisfies a crystal size in a specific range, whereby it has excellent crystallinity and thermal stability, and it is enhanced in all of the mechanical properties, dimensional stability, and moldability. Accordingly, the biodegradable polyester resin according to the embodiment can be applied to various fields that require thermal resistance, mechanical properties, dimensional stability, and moldability, such as packaging materials such as disposable bags and food containers, and automobile interior parts, so that they would exhibit excellent characteristics.